28203876 has 30 divisors (see below), whose sum is σ = 73731350. Its totient is φ = 9401184.

The previous prime is 28203871. The next prime is 28203881. The reversal of 28203876 is 67830282.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28203871) and next prime (28203881).

It can be written as a sum of positive squares in only one way, i.e., 25401600 + 2802276 = 5040^2 + 1674^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 28203876.

It is not an unprimeable number, because it can be changed into a prime (28203871) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 43201 + ... + 43848.

Almost surely, 2^28203876 is an apocalyptic number.

It is an amenable number.

28203876 is an abundant number, since it is smaller than the sum of its proper divisors (45527474).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28203876 is a wasteful number, since it uses less digits than its factorization.

28203876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87065 (or 87054 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 28203876 is about 5310.7321529145. The cubic root of 28203876 is about 304.3941246608.

The spelling of 28203876 in words is "twenty-eight million, two hundred three thousand, eight hundred seventy-six".